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FingerprintStore.cpp
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FingerprintStore.cpp
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#include "DirectoryWalker.hpp"
#include "Util.hpp"
#include <boost/filesystem.hpp>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <thread>
#include "FingerprintStore.hpp"
FingerprintStore::FingerprintStore(std::string srcDirectory)
: SrcDirectory(srcDirectory){};
void FingerprintStore::Load() {
// Start iteration through all files in the directory
DirectoryWalker dw(SrcDirectory);
dw.Traverse(true);
std::cout << "Loading fingerprints into memory..." << std::endl;
int loadedCount = 0;
while (true) {
auto next = dw.GetNext();
std::optional<boost::filesystem::path> entry = next.first;
bool completed = next.second;
// No next value as the directory traversal has completed.
if (!entry.has_value() && completed)
break;
// We may not have an entry, but if directory traversal hasn't completed, we
// should wait for the next one.
if (!entry.has_value() && !completed) {
sleep(1);
continue;
}
// Filter only known image suffixes
if (!Util::IsSupportedImage(entry.value()))
continue;
auto filename = entry.value().string();
Magick::Image image;
image.read(filename);
Fingerprints.push_back(std::pair(image, entry.value().stem().string()));
loadedCount++;
std::stringstream msg;
msg << "\r" << loadedCount;
std::cout << msg.str() << std::flush;
}
// Wait also on the directory traversal thread to complete.
dw.Finish();
std::cout << "\rDONE\n" << std::flush;
}
void FingerprintStore::FindMatchesForImage(Magick::Image image,
const std::string filename,
const int fuzzFactor) {
for (std::vector<std::pair<Magick::Image, std::string>>::iterator it =
Fingerprints.begin();
it != Fingerprints.end(); ++it) {
// Compare the image to the fingerprint for total number of non-matching
// pixels. Distortion will be the pixel count. 100x100 gives a minimum of 0
// and max of 10000.
image.colorFuzz(fuzzFactor);
auto distortion =
image.compare(it->first, Magick::RootMeanSquaredErrorMetric);
std::stringstream msg;
msg << filename;
// Pull the fingerprint match name from the fingerprint metadata if
// available.
std::string fingerprintName = it->first.attribute("comment");
if (fingerprintName == "") {
fingerprintName = it->second;
}
if (distortion < LowDistortionThreshold) {
msg << "\tis identical to\t" << fingerprintName << std::endl;
std::cout << msg.str() << std::flush;
continue;
}
if (distortion < HighDistortionThreshold) {
msg << "\tis similar to\t" << fingerprintName << std::endl;
std::cout << msg.str() << std::flush;
continue;
}
}
}
void FingerprintStore::RunWorkers(const WorkerOptions options) {
// Start asynchronous traversal of directory.
DirectoryWalker *dw;
if (options.WType == GenerateWorker) {
dw = new DirectoryWalker(SrcDirectory);
} else {
dw = new DirectoryWalker(options.DstDirectory);
}
dw->Traverse(true);
// Spawn threads for the actual fingerprint generation
std::vector<std::thread> threads;
for (int i = 0; i < options.NumThreads; i++) {
std::thread thread;
// Use the power of filthy lambdas to start the things.
switch (options.WType) {
case GenerateWorker:
thread = std::thread([=] { Generate(dw, options.DstDirectory); });
break;
case MetadataWorker:
thread = std::thread([=] { ExtractMetadata(dw); });
break;
case FingerprintWorker:
thread = std::thread([=] { FindDuplicates(dw, options.FuzzFactor); });
break;
}
threads.push_back(std::move(thread));
}
// Wait for them to finish
for (int i = 0; i < options.NumThreads; i++) {
if (threads[i].joinable())
threads[i].join();
}
// Wait also on the directory traversal thread to complete.
dw->Finish();
delete dw;
}
void FingerprintStore::FindDuplicates(DirectoryWalker *dw,
const int fuzzFactor) {
while (true) {
auto next = dw->GetNext();
std::optional<boost::filesystem::path> entry = next.first;
bool completed = next.second;
// No next value as the directory traversal has completed.
if (!entry.has_value() && completed)
break;
// We may not have an entry, but if directory traversal hasn't completed, we
// should wait for the next one.
if (!entry.has_value() && !completed) {
sleep(1);
continue;
}
// Filter only known image suffixes
if (!Util::IsSupportedImage(entry.value()))
continue;
// Read in one image, resize it to comparison specifications
auto filename = entry.value().string();
Magick::Image image;
try {
image.read(filename);
} catch (const std::exception &e) {
// silently skip unreadable file for the moment
continue;
}
image.compressType(
MagickCore::CompressionType::NoCompression); // may not be needed
image.resize(FingerprintSpec);
// Compare
FindMatchesForImage(image, filename, fuzzFactor);
}
}
void FingerprintStore::Generate(DirectoryWalker *dw,
const std::string dstDirectory) {
boost::filesystem::path dest(dstDirectory);
// Iterate through all files in the directory
while (true) {
auto next = dw->GetNext();
std::optional<boost::filesystem::path> entry = next.first;
bool completed = next.second;
// No next value as the directory traversal has completed.
if (!entry.has_value() && completed)
break;
// We may not have an entry, but if directory traversal hasn't completed, we
// should wait for the next one.
if (!entry.has_value() && !completed) {
sleep(1);
continue;
}
// Filter only known image suffixes
if (!Util::IsSupportedImage(entry.value()))
continue;
std::stringstream msg;
msg << entry.value().string() << std::endl;
std::cout << msg.str() << std::flush;
auto filename = entry.value().filename().replace_extension(
".tif"); // save fingerprints uncompressed
Magick::Image image;
try {
// destination filename
auto outputFilename = boost::filesystem::path(dest);
outputFilename += filename;
image.read(entry.value().string());
image.defineValue("quantum", "format",
"floating-point"); // fix HDRI comparison issues
image.depth(32); // also for the HDRI stuff
image.compressType(
MagickCore::CompressionType::NoCompression); // may not be needed
image.resize(FingerprintSpec);
image.attribute("comment", entry.value().string());
image.write(outputFilename.string());
} catch (const std::exception &e) {
// Some already seen:
// Magick::ErrorCorruptImage
// Magick::ErrorMissingDelegate
// Magick::ErrorCoder
// Magick::WarningImage
std::stringstream msg;
msg << "skipping " << entry.value().string() << " " << e.what()
<< std::endl;
std::cerr << msg.str() << std::flush;
}
}
}
void FingerprintStore::ExtractMetadata(DirectoryWalker *dw) {
// Iterate through all files in the directory
while (true) {
auto next = dw->GetNext();
std::optional<boost::filesystem::path> entry = next.first;
bool completed = next.second;
// No next value as the directory traversal has completed.
if (!entry.has_value() && completed)
break;
// We may not have an entry, but if directory traversal hasn't completed, we
// should wait for the next one.
if (!entry.has_value() && !completed) {
sleep(1);
continue;
}
// Filter only known image suffixes
if (!Util::IsSupportedImage(entry.value()))
continue;
try {
Magick::Image image;
std::string filename = entry.value().string();
image.read(filename);
std::string createdAt = image.attribute("exif:DateTimeOriginal");
if (createdAt != "") {
std::string timestamp = ConvertExifTimestamp(createdAt);
std::stringstream msg;
msg << filename << "\t" << timestamp << std::endl;
std::cout << msg.str() << std::flush;
}
} catch (const std::exception &e) {
// Some already seen:
// Magick::ErrorCorruptImage
// Magick::ErrorMissingDelegate
// Magick::ErrorCoder
// Magick::WarningImage
// Don't bother printing anything as we might run into all kinds of files
// we can't read.
}
}
}
std::string
FingerprintStore::ConvertExifTimestamp(const std::string timestamp) {
// https://en.cppreference.com/w/cpp/io/manip/get_time
// This is basically the example from the docs.
std::tm t;
std::istringstream ss(timestamp);
ss >> std::get_time(&t, "%Y:%m:%d %H:%M:%S");
// std::put_time requires an output stream to write to
std::ostringstream output;
output << std::put_time(&t, "%Y-%m-%d %H:%M:%S");
return output.str();
}